A bad batch is entirely different than a design flaw. Hopefully its the former and not the latter.
only reason im speculating on the batch is there are obviously people who own manual Zs right now both proto and not. if its a design flaw wouldnt they have to take their car back for a transmission replacement? I think we would have heard about that if so. but on the other hand the 370 has had 2nd gear grind in some cases for the last decade and some were saying since its the same transmission with a more robust clutch that is putting more strain on the synchros and thus the issue is more apparent. this entire roll out as just been everyone in the dark about everything.